Argued to be much easier and simpler to wear than the frames, which many believe do little if nothing to the size of your manhood, only leaving you with an empty wallet, this device is half the price as some extenders and is Pro Extender now medically proven in the U.S to produce tangible results - hence F.D.A approval.Placed around the base of the shaft, the vacuum protector sits there painlessly working on the principle of a stretch belt which is worn beneath clothing, invisible to the human eye.